51 lines
1.2 KiB
JavaScript
51 lines
1.2 KiB
JavaScript
import {
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MSG_XHR_DATA_YOUTUBE,
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MSG_GLOBAL_VAR_FETCH,
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MSG_GLOBAL_VAR_BACK,
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} from "./config";
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// 响应window全局对象查询
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(function () {
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window.addEventListener("message", (event) => {
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if (
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event.source === window &&
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event.data &&
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event.data.type === MSG_GLOBAL_VAR_FETCH
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) {
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const { varName, requestId } = event.data;
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if (varName) {
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const value = window[varName];
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window.postMessage(
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{
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type: MSG_GLOBAL_VAR_BACK,
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payload: value,
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requestId: requestId,
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},
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window.location.origin
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);
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}
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}
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});
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})();
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// 拦截字幕数据
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(function () {
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const originalOpen = XMLHttpRequest.prototype.open;
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XMLHttpRequest.prototype.open = function (...args) {
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const url = args[1];
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if (typeof url === "string" && url.includes("timedtext")) {
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this.addEventListener("load", function () {
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window.postMessage(
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{
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type: MSG_XHR_DATA_YOUTUBE,
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url: this.responseURL,
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response: this.responseText,
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},
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window.location.origin
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);
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});
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}
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return originalOpen.apply(this, args);
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};
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})();
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